I'm not 100% sure this is actually word-for-word, but alas. "In a presentation at Ubuntu Developer Summit currently going on in Denmark, Drew Bliss from Valve said that Linux is more viable than Windows 8 for gaming. Windows 8 ships with its own app store and it is moving away from an open platform model." I feel like a broken record by now but here we go again: keep an eye on Valve, even if you're not into games. This is the company pushing NVIDIA and AMD to improve their Linux support, with enough clout and name to actually get stuff done. Valve doesn't mess around.

The number of people gaming on Linux is less because the hardware support for audio and video isn't as good because there are few companies that support it because there isn't as much of a market because there aren't very many solid games because the the number of people gaming on Linux is less... repeat.

A proper solution will be the use of crossplaform library to render those games available to virtually any system.

Audio issue, PulseAudio is the most common for the majority of Linux based system. Video issue is related to the vendors themselves (AMD, Nvidia and Intel), some commercial games runs on MESA based driver without hiccups because of minimum requirement.

Isn't it ironic the market number is used as an excuse, yet gaming publisher have no problem releasing their game on Apple iMac and MacBook which are far less popular than Microsoft Windows system wordwide?
Looking at hundle bundle website (http://www.humblebundle.com/), on average, Linux system users are willing to pay more than both Mac and Windows showing a potential growing marketing. When a gaming company saw that opportunity, expect other to follow the suit.